Revert Next Action Due Date to CTA Due Date When All Tasks Complete

The current functionality of Next Action Due date is that it shows the CTAs Due date when there are no tasks, but when there are tasks it shows the next task due. 

This works when there are either no tasks are there are open tasks.  However, when all tasks are complete, it stays locked in to the last tasks due date.  This can lead to misleading UI where the CTA due date may be in the future, but since the tasks due date is in the past, the Next Action Due date shows red, which tends to indicate that something is overdue. 

I think it would be better if the Next Action Due date reverted to the  CTAs Due Date when all tasks are complete.  That way if the CTA date was in the future, the next Action Due Date would be in the future as well.  Otherwise if it was in the past, the red indication would be an accurate representation that something is indeed overdue.